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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 782 · 40 questions
TalentJR

The fast method (Build from 10%): 10%: divide by 10. 1%: divide by 100. 5% = half of 10%, 20% = double 10%, 15% = 10% + 5%. 50% = half, 25% = half of a half.

NameDateTime takenScore ___ / 40
  1. 1.20% of 330 =
  2. 2.5% of 230 =
  3. 3.20% of 160 =
  4. 4.10% of 850 =
  5. 5.10% of 330 =
  6. 6.50% of 730 =
  7. 7.5% of 830 =
  8. 8.5% of 890 =
  9. 9.15% of 690 =
  10. 10.1% of 470 =
  11. 11.50% of 90 =
  12. 12.50% of 630 =
  13. 13.25% of 850 =
  14. 14.1% of 870 =
  15. 15.25% of 630 =
  16. 16.15% of 450 =
  17. 17.25% of 340 =
  18. 18.1% of 410 =
  19. 19.1% of 220 =
  20. 20.5% of 360 =
  21. 21.15% of 670 =
  22. 22.5% of 90 =
  23. 23.5% of 180 =
  24. 24.20% of 170 =
  25. 25.5% of 70 =
  26. 26.1% of 190 =
  27. 27.1% of 820 =
  28. 28.50% of 530 =
  29. 29.50% of 380 =
  30. 30.25% of 360 =
  31. 31.20% of 500 =
  32. 32.5% of 730 =
  33. 33.25% of 240 =
  34. 34.25% of 130 =
  35. 35.50% of 40 =
  36. 36.5% of 120 =
  37. 37.10% of 280 =
  38. 38.25% of 190 =
  39. 39.15% of 830 =
  40. 40.10% of 70 =

Answer key

  1. 66
  2. 11.5
  3. 32
  4. 85
  5. 33
  6. 365
  7. 41.5
  8. 44.5
  9. 103.5
  10. 4.7
  11. 45
  12. 315
  13. 212.5
  14. 8.7
  15. 157.5
  16. 67.5
  17. 85
  18. 4.1
  19. 2.2
  20. 18
  21. 100.5
  22. 4.5
  23. 9
  24. 34
  25. 3.5
  26. 1.9
  27. 8.2
  28. 265
  29. 190
  30. 90
  31. 100
  32. 36.5
  33. 60
  34. 32.5
  35. 20
  36. 6
  37. 28
  38. 47.5
  39. 124.5
  40. 7

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